Elevator



' No. (il-7,778. v Patented lam.V I7, |899.

C. D., SEEBERGER. v l,

ELEVATUR.

Y n v (Application muuuy 19, 189s.) l (No Mgdel.) 4 Sheets-Sheet I.

llll'il No. 617,77a.

a 9 oh.. n, n. a 1 .lu e t n e t a D.. n. E G Dn E B E E s a a ELEVMoR. (Application Bled May 19, 1898.)

4 Sheets--Sheei 2.

(No` Model.)

.Sig

. Patented lan. I7, |899 C. D. SEEBERGER.

ELEvAToR.

(Application filed May- 19, 1896.)

4 Sheets-Sheet 3.

(No Model.)

Co hm# i UNITED STATES PATENT OFFICE.

CHARLES D. SEEBERGER, OF CHICAGO, ILLINOIS.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 617,778, dated January 17, 1-899.

Application led May 19, 1896. Serial No. 592,135. (No model.)

To @ZZ whom it may concern.-

Be it known thatI, CHARLES D. SEEBEEGEE, acitizen of the United States, residing at Chicago, in the county-of Cook and State of Illinois, have invented a certain new .and useful Improvement in Elevators, which is fully set forth in the following specication, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation of a portion of the tracks and of the trucks of my elevator.

Fig. 2 is a plan View of the structure shown in Fig. l. Fig. 3 is a detail elevation, partly in section, of the guide and guide-rollers of the sprocket-chain bars. Fig. 4. is a plan view of the-structure shown in Fig. 3 with the guide-rollers omitted. Fig. 5 is aplan View of a step or truck. Fig. G is a front elevation thereof with the risers omitted. Fig. 7 is an end or side elevation thereof, showing the con'- vex risers. Fig. Sis a plan of a passage-way and platform for entering upon the elevator. Fig. 9 is aside elevation of a portion of a movable balustrading and hand-rail. Fig. 10 is a vertical section on the line 10 10 of Fig. D, showingalso the track-casing below in section on line 10 10 of Fig. l and with the wheels and guide-rollers omitted. Fig. 11 is a horizontal section of the balustrading, taken trucks or steps are moved over tracks through' part of their extent horizontal and through part inclined, the said trucks'or steps remaining individually horizontal throughout such movement. f

My invention consists of certain improve-U ments upon several features of such an elevating mechanism. Y

The drawings illustrate only those parts thereof to which the constructions which cnstitute my invention are applied.

Referring to the drawings by letters and figuros, A represents one of the trucks or steps,

A the tread thereof, and A2, A3, and A4 three brackets secu red below the said tread A', both in front and in rear thereof, in such a way that the outer edges of the said brackets project beyond the partially-overlapping edges a.. of the tread A'. Between the said brackets and the said overlapping edge a and resting uponthe said brackets and rigidly secured thereto I place a bar B, which serves as a bed or supportfor the riser B'. The riser B consists of the horizontal portionB2 and the depending portion or riser proper, B3. The horizontal portion B2 rests upon the bar B, projecting under the overlapping edge a of the4 tread,

and is there pivotally secured by a pivot b, passing down through the parts a B2 B and the central bracket A3. The depending portion B3 of the riser is constructed to curve outward from the center of the step-1I. e., is

made convexsubstantially as shown in Fig.

7. Near the upper edge of the riser is preferably located a horizontal strip o'f rubber or other elastic material t', partly countersunk in the said riser.

The operation and advantages of the parts hereinabove described may best be stated at once. eling horizontally and in a straight line, the corresponding strips or nosings b of the adjacent steps are in contact with each other and by their elasticity remain in contact in spite o f slight changes in distance between the adjacent steps arising from their movement, obviating the possibility of the dress or person of the passenger by any chance becoming caught in any space which might otherwise be formed between the steps. When the steps commence their ascent along Whenthe trucks or steps A are travone of the inclined portions of the tracks, the

of each step bears against the lower edge b2 In such position, also, the elasticity of the nosing-strip 'b' forms a close-tting connec` tion between each two adjacent steps.

. The depending portion of the riser Bis formed curving outward or convex, as shown the direction of the arrow. The front nosingof the rear riser of the step next preceding.

ICO

in Fig. 7, in order that during the transition ofthe steps from their position with relation to each other upon the horizontal tracks to their position upon the inclined tracks there shall at no time be formed any space between the rear riser of one step and the nosing of the next succeeding. With this construction the said nosing will continue in contact with the said riser throughout the transition. The particular curve ot' convexity depends upon the mounting of said steps, theii` interconnection, &c., and will have to be worked out in each case. The essential principle is that the said riser should be curved and that such curve should be convex.

When the steps run upon tracks which are curved,.the said steps will usually be made narrower upon-the inside than upon the outside of such curve. When, however, they are to run upon twoor more curves of diiering radii, such adaptation would not be sulicient.

- It is necessary to provide a means by which thereby automatically-adjusting themselves to such changes in curve and preserving continuous close contact between the adjacent steps. The eect of the interposition of the wooden beam B .between the brackets A2 and the horizontal portion B2 of the riser is to prevent grating of the metal parts upon one another and so deaden sound and reduce friction in these parts.

In Figs. 13 and 14 I show an elevation and a plan View, respectively, of my elevator as arranged in a double spiral for ascending and descending between three iloors. The construction and varrangement of the tracks therein shown are fully described and claim ed in my application, Serial No. 57 3,068, led December 23, 1895, and will be described here simply for the purpose of illustrating one form of tracks with varying curves for which the mechanism of the present application is especially-adapted. l V

To explain the direction of the movement the point 1, where it is traveling horizon- 4point 2.

tally along the lowest floo'r shown, which may be called the first door. The passenger is carried a short 4distance horizontally to the Here the ascent begins, (-represented by the curvef 2 3 4 5at the last of oor along the curve 5 6 7 8, which does not appear in Fig. 13, sinceit is on the same level with and behind thocurved portion 17 18 19 20,

hereinafter referred to. At the point 8 the ascent from the second to the third door commences, represented by the curve 8 9 10 11.

At the point' ,11 the passenger reaches the third floor and is carried'horizontally over the same along the curve 11 12 13 14. At 14 begins the descent to the second floor, (represented by the curve1'4 15 16 17.) From the point 17 the passenger is transported horizontally over the second iioor along the `curve 17 18 19 20, this curve being inside of and parallel with the curve 5 6 7 8, hereinabove described. From the point-2O the descent to the rst door commences, and is represented by the curve 20 21 22 23. At the point 23 the passenger reaches the iirst floor again and is carriedv along the horizontal curve 23 24, &c., back to the original starting-point 1. `This curve 2324 1 2 being in great part vertically underneath the third-story curve 1l 12 13 14 is represented in dotted lines, chiefly in Fig. 14:. The arrows in the two figures are placed in corresponding positions and indicate thedirections of the movement above described. As particularly shown in Fig. 7, the tread of each step, broadly considered, consists of the central part or tread proper, A', and the two horizontal portions B2 B2 of the two risers attached thereto. `This construction has this f urther'advantage: The slight elevation of the centralpart A of the tread represents that portion of the tread upon which it is wholly safe for the passenger to stand, and by the diierence in level between A and Ll2 the passenger will instinctively feel whether' he is on or off the principal part of the step.

At each end or side, as it may be considered, of each step I forma depending bracket C, terminating in the upright arm C', which carries the horizontal wrist C2. This oiset connection between the wrist C2, from which the step is supported, and the step itself is for the purpose of permitting the side Ils of the casing H, later described, to extend down below the level of the tread A of the step. Otherwise, along the ascending travel of the4 steps, the rear portions of the yoke, hereinafter described, the rear wheels and rollers, and that part of the track upon which said wheels travel would be exposed and apt to catch the dress or person of a passenger, as well as to permit the entrance `of dirt into these parts.

The wrist (l2 terminates outwardly in a yoke D. This yoke is preferably formed of a forward and of a rearward extending arm D' and D2, respectively, the adjacent ends of the said arms being secured upon a sleeve D3, with which they may be cast integral. Their connection with such sleeve and with each other may be further securedby the bolts or pins d.' The wrist Cz isrigidly keyed in the sleeve D.

When the trucks move in asingle vertical plane-that is, when the tracks are not4 IOO IIO

The pivoted part d' is provided with bearings for a stub-axle on'which is mounted a wheek D4. In an upward extension (Z5 is mounted a second stub-axle carrying a roller D5 on the opposite side from D4. The ypivoted part d2 of the arm D2 is similarly provided with an upward extension d5 with a wheel D6 and with a roller D7. Thus the wheels D4 and D6 are located and travel in the same vertical plane.

The roller D5 and the roller D7 each travels ina vertical plane of its own.

Each succeeding step is severally provided on each side with a wrist O5, supported in a yoke'E, similar to the yoke D, hereinabove described, and carrying the wheels and rollers E E2, &c.,correspondin g to the wheels and rollers D4 and D5, dac.y The arrangement of the wheels is such that each front'wheel E' travels, when the steps are moving horizontally, in the space von the part of the steps, either when moving horizontally or upon an incline, as later described, and conduces materially to the -smooth running and the individual stability of the steps, particularly when the passengers walk up or down the moving steps. The pivoted construction of the arms D' and D2 enables the yokes, and so the mechanism as a whole, to adapt itself regularly and automatically to the changes in curve where the trucks are constructed to run on curved tracks. 7

Along such portions of their course as the steps run horizontally it is obviously necessary to provide but a single track F. At1

that point where the steps commence their ascent the horizontal track F is continued as the lower F'w of two inclined tracks. The track F may preferably be formed of' an angle-iron, as shown, comprising the horizontal flange F2, which forms the track proper, and

the vertical flange F3,which serves as a guardrail. Above the inclined track F' is provided a second inclined track F4, similarly consist.-

ing of an angle-iron comprising a lower horizontal flange F5 and a vertical flange F6.

During the ascent of the successive steps t he front wheels of each travel on the tracks F' and the rear wheels on the tracks F4, the tracks being so disposed relatively. to each other and the wheels so spaced apart that the steps remain severally horizontal during such ascent.

In order to guide each of the. rear wheels onto the upper track, I provide the shunt or switch track G, .which is placed in the vertical plane of travel of the rear roller D7 and` in such position that the vsaid rea-r roller D7- will enter upon the sa' -track at the same moment that the front wheel carried by the same yoke enters upon the lower inclined track F'. At that point where the rear wheel by the onward movement of the track `enters upon the upper inclined track F4 the switchtrack G is discontinued. These tracks are all preferably mounted within a casing H, as shown in Fig. 10, the said casing consisting of the outer wall H', the top H2, the inner depending side. H5, and the bottom H4. The tracks are mounted within the said casing upon suitable brackets or in any other convenient way. It will be observed that Fig. 10 is taken upon the opposite side of the series of trucks from Figs. 1 and 2. The brackets may be made-adjustable in the casing and the tracks thus adjustable on the brackets, as shown in Fig. l0. Similar tracks are provided for the descent of the steps or trucks, and at the beginning and end of each ascent `and descent there will be provided a shunt or switch track similar to G. By this location of the rollers D5 and D7, I avoid the necessity of u pthrust bearings and 'other devices adapted to prevent the steps from tipping, which are requisite whenthe said rollers are mounted opposite the centers ot' their respective steps or thereabout,.as previously has been done.- Inasniuch yas such upthrust bearings, &c., are. only partially eiiicacious in preventing the `tendency totip onthe art of the steps lin changingl the direction of t eir motion, this location of the rollers is the only ICO construction which insures smooth running of the steps at s'uch points.

From the center of the bottom of each step a post 'I extends downwardly, terminating in a yoke J, comprising the two curved branches or arms J and J2. Upon each of the said arms is formed a short stub-axle K, upon which is mounted .obliquelya wheel or' roller K', adapted to travel in theguide-track K2, disposed below and outside of the said roller. Above the said roller K', preferably only at and near that point where the steps commence their ascent, I place'an upthrust trackv or bearing K3 to check any tendency on the part of the steps to lift at such point, owing rio to the resultant between the upward pull on the ascending steps andthe resistance of the horizontally-moving steps. This construction checks such an upthrust tendency more directly more nearly at the point of application of that force than where such upthrust tracks are arranged over the .supporting -lwheels or rollers outside of the steps and avoids stress in the steps arising'from such other construction.

Upon pivots L', mounted in the depending arms J' andJ2 of the yoke J, are loosely mounted the adjoining ends of the sprocketchain bars M. Each of thesprocket-chain bars carries a'doublelset of teeth M"M2,.which IZO are adapted to mesh withsuitable sprocket-v wheels that are located at appropriate points and supply motive power tothe yseries of trucks or steps. The adjoining ends of the i the relative length of such chain-bars.

chain-bars are rabbeted, as at m', the rabbeted end m carrying a tooth M3, corresponding to the teeth M', the end lm' carrying a tooth M4, corresponding to the teeth M2, the pivot L passing through both of said teeth M3 and M4. ,A certain amount of play is left between the adjacent surfaces of the ends m and m to permit the chain-bars to adapt themselves to the changes in curve where the steps move upon curved tracks. The advantage of this construction over that where two sets of sprocket-chain bars are employed, one attached to each side of the steps,-is most marked in case the steps are to run upon curved tracks, since such tracks must frequently be made with changes in the radii of curvature, which in case of an outer and an inner set of chain-bars will require an adjustment in The present construction involving but one set of chain-bars, centrally attached to the steps, accommodates itself to slight changes in curve automatically and readily. The guide-tracks K2, through the rollers'K, receive any side thrust which may arise when theV steps are moving along curved tracks. Both of these features-the centrally-disposed sin gle-chain bar system and`the guides and rollers-fare applicable and advantageous in cases where the steps move in the same vertical plane.

In a previous application, filed December 23, 1895, Serial No. 573,068, I have shown and described an endless wainscoting adapted to move at each side of the series of steps along certain parts of their course, preferably the inclined portions thereof, the said wainscoting being timed to move at the same rate and in the samedirection with the said steps, but otherwise independent thereof. The construction hereinafter described constitutes certain improvements upon the previous construction referred to. Along a certain portion of the travel of the steps, upon one or both sides thereof, I place a hood N, substantially of the form shown, supported from below bythe posts N', which may preferably rest upon the track-casing H. Upon each side of the inside of the hood N is formed )a track N2, adapted to receive a roller Ns. Each of the said rollers supports a 'stanchion O, comprising a base portion O', an -upper hollow portion 02,' and an offset or bracket 0.3,

whichis provided with a stub-axle for the roller N3. Near the lower end of each stanchion is secured a bracket 04,. carryin ga roller 05, adapted to travel in the guide N4, carried on each side of the posts N'. The offsets or brackets ,O3 carry a sprocket-chain P, which meshes with a sprocket-wheel P', keyed upon a vertical shaft P?,- mounted within the hood and balustrading and preferably extending down within the track-casing H, where it -is supplied with power requisite to revolve the said. shaft. Toward the lower end of the shaft P2, I may mount a sprocketwheel P3 carrying` one or more teeth P, adapted to engage with the brackets O4 at thel lower end of the stanchions, and thus counteract any tendency of the lower ends of the said stanchions to lag.

The stanchions are disposed at any con'- venientdistance apart and may be secured in such relative position in any one of several ways. The following is one method which I find preferable: The lower ends of the adjacent stanchions are connected together by thin elastic bands of metal Q, secured thereto by pivots'Q'. To the bands Q are secured blocks Q2 of wood or other convenient material by centrallydisposed pins or bolts q, passing through the said band and through a spring-washer q'. These blocks are so disposed relatively to each other that where the endless balustrading is moving in a straight line the ends of the blocks -are approximately in contact with each other. When the balustrading at the end of its course passes around the curve requisite to start it on its return course, the blocks will take the position shown in the right-hand side of Fig. l1 as tangentsto the curveformed by the supporting-band. Higher up on the stanchions I may provide a second set of similar bands R, supporting similar blocks R2.

Within the hollow upper portion of each stanchion I mount an upwardly and outwardly projecting arm S, pivoted to move in a vertical plane, as at s, and carrying at its lower end near` its pivotal point a segmental gear extension S'. The said arms carry a hand-rail, which I have shown to be formed of a cord or IOO rope S2, secured in the ends ofthe said arms rail as the curve is approached, but to provide `some positive means by which the said .arms are automatically tilted in such manner that the outer ends of the arms move through the same curve as do the inner ends and all stretch in the rail is avoided. This I provide for-by mounting in the tubular upper portion of each stanchion a shaft T, the -lower` end of which carries a worm-gear T', adapted tor engage with the gearsegment S. of the shaft T is mounted a pinion T, which mesheswith the rack T. The rack 'l's is preferably mounted upon a depending. bracket T,

On the upper end rzo TIO

supported from the casing, and is placed at a point just before that where the balustrading commences to curve in order to take its return course. By this mechanism the arm S is tilted up from the operative position shown on the left-hand side of Fig. 10 to the position shown on the right-hand side thereof. I find it preferable to allow thearm S to remain tilted up in the latter position during the time of its return travel to that point where the balustrading again curves around to its starting-point, whence it moves along with and in proximity to the steps,|as'above stated. The second-rack will at thispoint therefore be placed upon the other side of the pinion T2 in order to tip the arm S down into operative positiom Fig. 8 represents a form of passage-way for entering upon the steps when the same are moving horizontally. At a suitable point I construct a platform extension V, supported ro from the platform proper on both sides of the moving steps, preferably of the form shown in the said figure, and provide' the said eX- tension with the fixed railings V' and V2, which are so curved that while the passenger enters upon the platform extension in a direction approximately transverse to that of the movement of the steps he leaves the said extension and steps on the moving steps in the direction of their motion. I may find it zo desirable in case the steps are wide enough to accommodate two or more passengers each side by side to provide one or more railings, such as V3, dividing the said single passageway into two or more passage-ways of the same form. The arrowsin the said figure represent the direction in which the passengers enter the said passage-way and the direction in which the steps lmove. The platform V will preferably be so placed that the steps 3o will just clear it in passing underneath. By this construction it will be obvious that if the steps be run at a rate of speed approximating the ordinary rate of walking of the passenger suchpassenger stepping from the platform V onto the steps A will experience no jerk whatsoever from the movement of the step. The step will merely continue his own motion at the same rate and in the 4same direction.

Although I have shown and described but 4c one specific form of construction for the several devices which form the subject-matter of my invention, I do not limit my invention to the said specific forms, since many obvious modiiications therein may be made; but

What I claim, and desire to secure byLetters Patent, is-

l. In an elevating apparatus a series of traveling steps, the upper surfaces of which are adapted to remain severally horizontal 5o whether the steps be moving4 horizontally or Aon an incline, the said 4steps being provided with risers having a convex surface and -so mounted thereon as to keep the adjoining steps in contact throughout their length in passing from a horizontal to an inclined surface, and vice versa, and in passing from one vertical plane of movement to another, substantially as described.

2. In an elevating apparatus a series of 6o traveling steps, the upper surfaces of which are adapted to remain severally horizontal v whether the steps be moving horizontally or on an incline, the said steps being provided with risers having a convex surface and centrally pivoted thereon so as-tokeep the vadjoining steps in contact throughout their length in passing from a horizontal to an inclined surface and vice versa', and in passing from one vertical plane of movement to another, substantially as described. 7o

3. In an elevating apparatus of the general type described, the combination of a series of interconnected steps having risers convex as at B3, and provided with elastic nosings 19'; and of tracks for said steps, said tracks 7 5 being partly horizontal and partly inclined.

Lt. In an`elevating apparatus of the general i type described,the steps A,comprising a tread A', and one or more risers B' pivoted to rotate in a horizontal plane. 8o

5. In an elevating apparatus of thegeneral type described, the steps A each comprising a tread A', and one ormore risers, B', each of the said risers consisting of ahorizontal part B2, pivoted beneath the tread A', and a de- 85 pending part B3.

6. In an elevating apparatus of the general type described, the steps A, each comprising the tread A', the brackets A2, and one or more risers B', consisting of a horizontal port-ion B2, 9o and a convex depending portion B3, the horizontal portion B2 being pivoted vbetween the said tread A' and the said brackets A2.

7. 'In an elevating apparatus of the general type described,the steps A, provided on either side with the depending bracket C, the upright arm C', the wrist C"e connecting with the Wheel-su pports of the steps and the track-casing H, the inner side of which, H3, projects down within the space between the arm C' and roc` the body of the step.

8. In an elevating apparatus of the general type described, the steps A, provided with wheels, the front wheels of one step being in advance of the rear wheels of the adjacent preceding step, substantially as shown and described.

9. In an elevating apparatus of the general type described, the platform-trucks compris ing the yokes D, each yoke consisting of the 11o horizontal body portion provided Ywith the wheels D4 and D6 journaled in its respective ends and one wheel in advance of the other,

` and with the rollers D5 and D7 also journaled in said ends of the yoke, and in different planes from the wheels D4 and D6, substan- /tially as and for thepu'rposes described.

10. In an elevating apparatus of the general type described, the platform-trucks comprising the yokes D, each consisting of the hori- 12o zontal arms D'- and D? projecting forwardly and rearwardly from the center of the yoke and in different parallel planes; the wheels D4 and D6 carried by the arms D and D2, and journaled on the inner side of said arms so as to bein thesame plane; and the rollers D5 and D7 also carried by the arms D", and D2, and journaled on` the outer sides thereof so as f to be in dierent planes from the rollers D4 and D6, and in different planes from each 13o other, substantially as and for the purpose d e-f scribed. l

11. In an elevating apparatus of the general type described, the platform-trucks comprising the yokes D, each consisting of the horizontal arms D' and D2 projecting lforwardly and rearwardly from the center of the yoke and in different parallel planes, and having the pivoted ends d and d2; the wheels D4 and D6 carried by the pivoted ends tl' and d2, and journaled on the inner side of said ends so as to bein the same plane; and the rollers D5 and D7 also carried by the ends cl and 12, and journaled on the outer sides thereof so as to be in different planes from the rollers I)4 and D, and in dierent planes from each other, vsubstantially as and for the purpose dcscribed.

12. In an elevating apparatus of the general type described, the platform-trucks comprising the yokes D, each yoke consisting of the horizontal body portion provided with the wheels Dl and D journaled in its respective ends and one wheel in advance of the other, and with the rollers Dand D7 also journaled in said ends of the yoke, and in dierent planes from the wheels D`1 and D6; the horizontal tracks F, andthe inclined tracks F and F4, with which the wheels D4 and D6 cooperate; and the switch-track G in a different plane from the tracks F, F', and F4, to cooperate with the roller D7, substantially as and for the purpose described.

13. In an elevating apparatus of the general type described; the steps A; the yokes D; the wheels D4 and DG tive. arranged' so vthat Vthe front wheels are in advance of the rear wheels of the adjacent preceding step; the

rollers D5 and D7; the horizontal tracks F; the inclined tracks F and F4; and the switchtrack G, arranged and operating substantially as shown and described.v

14. In an elevating apparatus of the general type described, a series of interconnected steps,in combination with adjustable inclined tracks, substantially as shown and described.

15. In an elevating apparatus of the general type described, a series of interconnected steps, in combination with inclined tracks horizontallyand vertically adjustable in their post I; the yoke J the pivot L; and the chainbars M, provided with teethl M' and M2, and' rabbeted at their ends as at 'm and m', the said ends carrying the teeth M3 and M4, respectively, and being mounted on the pivot L.

- 4 19. In an elevating apparatus of the general post I; the yoke J; mechanism attached'to` the said yoke adapted to move the steps; one or more guide-rollers K mounted on the said yoke; the guide-tracks K2 on which said rollers run; and theupthrust tracksK, against which said rollers bear.

21. In an elevatingapparatus of the general type described, a balustrading comprising a series of stanchions O; the elastic stripsQ connecting said stanchions; and means for supporting and moving the said balustrading,

,substantially as shown and described.

22. In an elevating apparatus ofthe general type described, a balustrading comprising the stanchions O; the elastic metal stripsQ connecting said stanchions; the blocks Q2 carried by the said strips; and means for supporting and moving the stanchions, substantially as l described.

23. In an elevating apparatus of the general type described, a balustradin g comprising the stanchionsO; the elastic strips Q connecting said stanchions; the blocks Q2; the pivots q; the spring-washers q'; and means for supporting and moving the said balustrading, substantially as described.

24. In an elevating apparatus of the general type described, a bal ustrading comprising the stanchions O; the arms S pivoted to the said stanchions and carrying a hand-rail; positiveacting mechanism adapted to tip the arms S into a vertical position where the balustrad# ing makes its turns; and means for supporting and moving the said stanchions.

25. In an elevating apparatus of the general type described, the stanchions'O; the pivoted arm S; the gear S'; the shaft T; the worm T'; and means adapted to rotate the said shaft, and tip the arm S into a vertical position, located 'at the point where the balustrading makes its turn, substantially as described.

26. In an elevating apparatus of the general type described, the stanchions O; the supporting-rollers N3; the sprocket-'chain P carried by the stanchions; the shaft P2 carrying a sprocketfwheel P', adapted to engage with the sprocketchain P to supply movement thereto, and carrying a sprocket-Wheel P3 adapted to engage with the brackets 04 carried by the stanchions; the guide-rolls O5 carried by the said brackets O4; guides in which the said rolls are adapted to travel; and means for revolving said shaft P2, substantially as described.

CHARLES D. SEEBERGER.

Witnesses:

H. GORDON STRONG, A. A. MURRAY.

IIO 

